<template>
    <div id="app">
      <table class="tb">
        <tr>
          <th>编号</th>
          <th>品牌名称</th>
          <th>创立时间</th>
          <th>操作</th>
        </tr>
        <!-- 循环渲染的元素tr -->
        <tr v-for="(item,index) in list" :key="item.id">
          <td>{{item.id}}</td>
          <td>{{item.name}}</td>
          <td>{{item.time}}</td>
          <td>
            <button @click='a1(index)'>删除</button>
          </td>
        </tr>
        <tr v-if="list.length === 0" >
          <td colspan="4">没有数据咯~</td>
        </tr>
        <button  @click="a2">增加一个玛莎拉蒂</button>
      </table>
    </div>
  </template>

<script>
    export default {
      data() {
        return {
          list: [
            { id: 1, name: "奔驰", time: "2020-08-01" },
            { id: 2, name: "宝马", time: "2020-08-02" },
            { id: 3, name: "奥迪", time: "2020-08-03" },
          ],
          list2:[
          { id: 999, name: "玛莎拉蒂", time: "2023-09-09" },
          ]
        }
      },
      methods:{
           a1(index){
                this.list.splice(index,1)
           },
           a2(){
              this.list.unshift(this.list2[0])
           }
      }
    }
    </script>

<style>
    #app {
      width: 600px;
      margin: 10px auto;
    }
    
    .tb {
      border-collapse: collapse;
      width: 100%;
    }
    
    .tb th {
      background-color: #0094ff;
      color: white;
    }
    
    .tb td,
    .tb th {
      padding: 5px;
      border: 1px solid black;
      text-align: center;
    }
    
    .add {
      padding: 5px;
      border: 1px solid black;
      margin-bottom: 10px;
    }
    </style>